I know this has been asked before, but what is good wording to update something on your c.v. Relatedly, what type of "accomplishment" makes this even worth doing?

I just got a "minor revision" decision (basically an "accepted pending revision") decision on a paper that was listed on my c.v. as "submitted." The editor said that they would like to publish the paper but I needed to address a few minor things first. The journal is decent but not super-high impact and the work isn't necessarily my crowning achievement, more just a solid paper in a series of others on the same general topic. So…is it worth even writing the committee to say anything? Would it be worth it if the paper is indeed fully accepted? (I might be able to turn this around fast enough to do that, because the committees only just started reviewing applications; 10/1 deadlines.) If it is worth it, any advice on the wording of the e-mail?

If it were me, I would only update if it is accepted. Check the journal's submission portal. Different journals draw the line of "acceptance" in different places, and so the best place to see the real status is there (the language in the editor's letter is often much less clear). If it's listed as "Rejected" or "Awaiting Revision" or "Minor Revisions" or something like that, I would not update. This is because - in the off chance it doesn't get accepted - you will have to make another awkward update, or have to address the issue in your interviews…blergh. No good could possible come from that. If it says "Accepted" or "Accepted with Minor Revisions" then I would definitely update them, since the journal has formally accepted the paper. Depending on where you're applying, having n vs. n+1 publications can make a big difference, especially at places that construct their long-lists based on the numbers.

I agree that you should wait until the paper is accepted. I recently sent updates to search committees on this issue and I would definitely update the committees once the paper gets acepted. Just send an email to the search committee chair (inquire with the department secretary to get the name of the search committee chair if needed) letting them know that you recently had a paper accepted and that you have attached an updated CV and a preprint of the paper. If you don't want to give them a preprint then you don't have to but I don't see how it could hurt your application.